Agmina recurvata, Espeland & Sjöberg & Johanson, 2020

Espeland, Marianne, Sjoeberg, Tin & Johanson, Kjell Arne, 2020, Description of 47 new species of the New Caledonian endemic caddisfly genus Agmina Ward & Schefter (Trichoptera, Ecnomidae), ZooKeys 956, pp. 49-162 : 49

Agmina recurvata sp. nov. Figs 185-189

Diagnosis.

Agmina recurvata sp. nov. is unique among Agmina species in having left and right inferior appendages longitudinally separated along their length, each with a small mesally orientated process, and a very long posterior branch that is strongly curving postero-dorsally before meeting basis of the superior appendages. Agmina taoensis sp. nov. also has long inferior appendages that are curving dorsally, but these are fused into a plate, as seen in ventral view. Furthermore, it lacks the mesally orientated processes, and the posterior branch is much shorter and not so strongly curved dorsally. Agmina cerritula sp. nov. and A. monstrosa sp. nov. have similar inferior appendages in lateral view, but in these species the long processes are united into a single central process, not paired and lateral as in A. recurvata sp. nov.

Etymology.

Recurvata, referring to the re-curved shape of the inferior appendages.

Material examined.

Holotype: New Caledonia - Province Sud • ♂; Rivière des Lacs, 1.1 km NW Lac en Huit, 4.9 km NW summit of Pic du Grand Kaori: 22°15.195'S, 166°52.178'E; 10.xii.2003; light trap; loc#078; leg. KA Johanson; MNHN.

Paratype: New Caledonia - Province Sud • 1 ♂; Rivière des Lacs, above waterfall at Chutes de Madeleine; 22°13.930'S, 166°51.633'E; 243 m; 23.xi.2003; light trap; loc#042; leg. KA Johanson; NHRS.

Measurements.

Fore wing length 2.1-3.6 mm (N = 2). Total length of genitalia: 0.5 mm.

Description.

Genitalia: In lateral view, segment IX sharply triangular anteriorly, apex located dorsally; in ventral view anterior incision widely and deeply U-shaped. Sternal processes, lateral view, with dilated posteriorly, dorsal and ventral margins almost straight; in ventral view, not clearly visible as it is hidden below inferior appendages. Tergum X in lateral view almost trapezoid, with dorsally orientated process at anterior corner; approx. as long as high; in dorsal view, mesally located close to each other but separate, anteromesal and posteromesal margins almost straight. Parameres anterior part slender, starting below and before anterior end of tergum X, almost straight till mid-height of posterior margin of tergum X, bending slightly ventrally and running into mid-part of superior appendage; in dorsal view, separated along their length, orientated posterad, equally narrow at basal half, few stout setae present on dorsal faces before end of tergum X; mesal lobe with setae present near basal part of superior appendage, fusing with superior appendage with long row of short megasetae. Superior appendages, in lateral view, dilated posteriorly, dorsal and ventral margins almost straight; in dorsal view forming oval lobes with almost straight lateral and convex mesal margins. Inferior appendages, in lateral view, with basal part narrowing posteriorly into very long and almost scale-like dorsally looped distal part; scale-like distal part orientated dorsally and lack setae; in ventral view separate along their lengths, not forming central plate, narrowly oval and divergent, posterior slander part orientated posteromesally. Phallus, in lateral view weakly sigmoid, approx. as long as inferior appendages; in ventral view vase shaped, with basal part almost double as wide as posterior part.

Additional information.

This species was referred to as "sp. 28" in Espeland and Johanson (2010a).

Figures

Figures 185 - 189. Agmina recurvata sp. nov. male holotype 185 genitalia, left lateral view 186 genitalia, dorsal view 187 genitalia, ventral view 188 phallus, lateral view 189 phallus, ventral view.